Quartz mill



Oct. 29, 1935. J. J, THlEX 2,019,061

' QUARTZ MILL Filed Oct. 30, 1953 5 Sheets-Sheet l Inventor rfohhrIThieao Oct. 29, 1935. J EX I 7 2,019,061

. QUARTZ MILL Filed Oct. 30, 1933 5 Sheets-Sheet 2 Inventor Tia/2,12 J 772 z'ezQ Oct. 29, 1935.

J. J. THIEX QUARTZ MILL Filed 0x150, 1933 5 Sheets-Sheet 5 4 n 7 3 m 7 1 1/ M w w ,M v J 0 W 2..

B r 1 m, 2 744 M4 1 3 \7 M $2 m I? f1 llomey Oct. 29, 1935. J. J. THIEX 2,019,061

QUARTZ MILL Filed Oct. 30, 1953 5 Sheets-Sheet 4 Oct. 29, 1935. J J, TH|EX I 2,019,061

QUARTZ MILL Filed Oct. 30, 1953 5 Sheets-Sheet 5 Inventor rfohnl mm Patented Oct. 29, 1935 UNITED STATES PATENT OFFICE 3 Claims.

The present invention relates to new and useful improvements in quartz mills of the type comprising a plurality of grinding or crushing wheels and has for one of its important objects to provide, in a manner as hereinafter set forth, novel means through the medium of which the pressure of said wheels may be conveniently adjusted as desired.

Other objects of the invention are to provide a mill of the aforementioned character which will be comparatively simple in construction, strong, durable, highly efficient and reliable in operation, compact and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:-

Figure 1 is a View in side elevation of a mill constructed in accordance with the present inven- .tion.

Figure 2 is a view in top plan thereof.

Figure 3 is a View in vertical section through the mill.

Figure 4 is a detail view in top plan of the bridge member in which the pressure adjusting screw is threadedly mounted.

Figure 5 is a view in top plan of the hub with the guide spider mounted thereon.

Figure 6 is a detail view in side elevation of the hub.

Figure 7 is a detail view in bottom plan of the hub.

Figure 8 is a detail view in side elevation of one of the crushing or grinding shoes.

Figure 9 is an elevational view of one of the grinding or crushing shoes, looking at the outer periphery thereof.

Figure 10 is a sectional view, taken substantially on the line Ill-l9 of Figure 8.

Figure 11 is a view in bottom plan of the mill.

Figure 12 is a detail view in elevation, looking at the inner side of one of the grinding or crushing wheels.

Referring now to the drawings in detail, it will be seen that the embodiment of the present in- 'vention which has been illustrated comprises a. pan which is designated generally by the reference numeral I, said pan including upper and lower sections 2 and 3, respectively, which are detachably secured together, as at 4. The bottom 5 of the lower section 3 is provided with a raised central portion of dome 6 having an opening 1 in its top. Projecting horizontally into the dome 6 from the bottom 5 of the lower section 3 are integral segments 8 to which a bearing 9 is secured, as at If]. Journaled in the bear- 5 ing 9 is a drive shaft H which terminates, at its upper end, in a polygonal head I2. A brass bushing I3 is provided in the bearing 9 for the shaft ll. Projecting outwardly from the bottom 5 of the lower section 3 are ape-rtured ears M which 10 accommodate anchor bolts.

Mounted centrally in the pan l is a vertical, rotary hub 15 in which a shaft It is transversely mounted the hole in the hub through which the shaft passes being slightly oblong vertically to 15 permit the shaft to have slight or limited rocking movement. In its lower portion the hub I5 has formed therein a tapered polygonal socket H for the reception or" the head l2 of the drive shaft ll. The lower end portion of the hub i5 is ro- Z0 tatably engaged in the opening I of the dome 6. It will thus be seen that the hub I5 is mounted for vertical movement in the pan l, the head l2 being slidably engaged in the socket H.

The top E8 of 'the upper section 2 has formed 25 centrally therein an opening which is traversed by a bridge member is. Threadedly mounted for adjustment in the bridge member I9 is a pressure regulating screw 2i) having formed on its upper end portion a hand wheel 2|. The adjusting screw is provided with a bore which slidably receives a guide shaft 22 having a head 23 on its lower end which is engaged in a tapered socket 24 in the upper end portion of the hub IS. A pin 25 depends from the head 23 through an opening 26 provided therefor in the hub i5 and said pin 25 is engaged in the shaft It for locking said shaft against longitudinal movement in the hub.

The screw 20 regulates the tension of a coil spring 21 which yieldingly urges the hub it downwardly. An anti-friction bearing 28 is interposed between the spring 21 and the top of the hub l5. A brass wearing ring 29 is interposed between the adjusting screw 20 and the upper end of the coil spring 2'5. Depending from the top 18 of the upper section 2 is an integral annulus 30. The upper end portion of the hub 15 is reduced to provide a horizontal shoulder 3! upon which a guide spider 32 rests. The legs of the guide 32 terminate in upturned free end portions 33 slidably engaged with the inner periphery of the annulus 39 and having slots 3G therein which accommodate headed guide pins which are mounted in said annulus 30.

Journaled on the end portions of the shaft [6 5 '4! are provided between the retaining nuts 4t and the split rings 38.

The peripheries of the wheels 36 are stepped circumferentially and have mounted thereon annular shoes 42 which are secured in position by pouring babbit 43 between said shoes and said wheels. The shoes 42 travel on a die ring 44 which is mounted in the lower portion of the section 3. The die ring 44 hasforrned on its outer periphery an inclined flange 45.

of the pan 1 is an inner wearing ring 46 which encircles said dome 6. The reference numeral 47 designates an outer wearing ring or lining which rises from the flange 45 of the die ring 44.

Mounted on the top l8 of the upper section 2 is a hopper 48 through which the material is placed in the mill. The lower pan section 3 and the ring 47 have formed therein a plurality of circumferentially spaced outlet openings 49 which are provided with screens 53. The reference numeral 5| designates drain openings in the lower portion of the pan l and 52 is a water inlet opening.

' Briefiy the operation of the mill is as follows:

The pan l is filled with Water substantially to the level of the screened outlet openings 49. The mill is then started and the material is allowed to enter through the hopper or funnel 48, as will be understood. As the wheels 36 travel in a circular path in the pan I, the ore or other material is crushed or ground between the shoes 42 and the ring 44, as will also be apparent. Then, the centrifugal force of the mill in operation causes the crushed ore or slime to be thrown outwardly through the screened outlet openings 49. The mill may be driven from any suitable source of power and at the speed which may be found to give maximum efliciency. The spring 21 presses the shoes 42 on the wheels 36 against the ring 44 and, as hereinbefore stated, this pressure may be regulated as desired through the medium of the screw 29. By this arrangement, conditions presented by both soft and hard quartz can be met. Further, should extreme resistance be encountered between the shoes 42 and the ring 44, the spring 21 will permit the entire rotary assembly to rise in the pan l and due to the guiding means provided for by the dome 6 and the spider 32 with the annular member 30, any tendency of the parts to bind or jam during this vertical movement is eliminated and as the drive shaft II has its upper end fitting loosely in a socket in the lower end of the hub, there is no danger of the drive shaft interfering with the vertical movement of the hub'and the parts carried thereby as there would if the hub was slidably arranged throughout its length on the drive shaft. The reference numeral 53 designates a neck which rises from the dome 6 in spaced, concentric relation to the vertical hub l5. 7

It is believed that the many advantages of a mill constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction Inter posed between the die ring 44 and the dome 6 and in the combination and arrangement of parts may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is:

1. A mill of the character described comprising a pan including detachably connected upper and lower sections, the lower section having screened outlet openings therein and further having drain openings therein, a dome rising centrally from the bottom of the lower pan section, said dome having an opening in its top, the top of the upper section having an opening therein, a bridge member traversing the last named opening, an annulus depending from the top of the upper pan section, a vertical hub mounted for rotary and vertical movement in the pan and slidably engaged in the opening in the dome, said hub having sockets in its upper and lower ends, a shaft mounted transversely in the hub, a die ring mounted on the bottom of the lower pan section, grinding wheels journaled on the "end portions of the shaft for travel on the die ring, a pressure regulating screw threadedly mounted in the bridge member, a guide shaft engaged in the upper socket of the hub and extending slldably through the screw, a coil spring encircling the guide shaft between the screw and the hub for yieldingly urging the grinding wheels toward the die ring, an anti-friction bearing interposed between the coil spring and the hub, a guide spider mounted'on the upper portion of the hub and slidably connected with the annulus, and a, vertical shaft journaled in the lower pan section and slidablyengaged in the lower socket of the hub for actuating said hub.

, 2. A mill of the class described comprising a. vertically arranged casing having screened openings in the lower portion of its sides, above the bottom of the casing, a vertically arranged hub in the casing, upper and lower supporting and guiding means in the casing for the upper and lower ends of the hub, supporting the hub for rotary and vertical movement, a horizontally arranged shaft passing through the hub intermediate the ends thereof, grinding wheels jourof the hub, and means for adjusting the tension of such means from the exterior top part of the casing, said casing being composed of upperan'd lower pan-shaped sections, the upper section being inverted and means for detachably connecting the two sections together, the guiding and supporting means including a dome'rising from the bottom of the casing and having an opening in the central portion of its top for rotatably and slidably receiving the lower end of the hub, a. spider having its hub portion resting on a shoulder at the upper end of the hub, an annulus depending from the top of the casing and 'slidingly receiving upturned ends of the arms of thespider and pin and slot connections between the ancentral part of the casing and having a non-circular socket in its lower end, a vertically arranged drive shaft extending into the lower part of the casing and having a non-circular upper end fitting in the socket, a horizontally arranged shaft passing loosely through an intermediate part of the hub, a grinding wheel rotatably connected in each end of the shaft and engaging the die ring, a vertically arranged pressure regulating screw in the top of the casing, a spring located between the lower end 01' the screw and the upper end of the hub, a vertically arranged guide shaft pass ing slidably through the screw, the upper end of the hub having a socket therein for receiving the lower part of the guide shaft, and a hole extending downwardly from the socket, the lower end of the guide shaft having a reduced end passing through the hole and the horizontal shaft having a hole therein receiving said reduced end of the guide shaft.

JOHN J. THIEX. 

